/usr/lib/ruby/vendor_ruby/sequel/adapters/shared/ is in ruby-sequel 4.15.0-1.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/ruby/vendor_ruby/sequel/adapters/shared/access.rb
/usr/lib/ruby/vendor_ruby/sequel/adapters/shared/cubrid.rb
/usr/lib/ruby/vendor_ruby/sequel/adapters/shared/db2.rb
/usr/lib/ruby/vendor_ruby/sequel/adapters/shared/fdbsql.rb
/usr/lib/ruby/vendor_ruby/sequel/adapters/shared/firebird.rb
/usr/lib/ruby/vendor_ruby/sequel/adapters/shared/informix.rb
/usr/lib/ruby/vendor_ruby/sequel/adapters/shared/mssql.rb
/usr/lib/ruby/vendor_ruby/sequel/adapters/shared/mysql.rb
/usr/lib/ruby/vendor_ruby/sequel/adapters/shared/mysql_prepared_statements.rb
/usr/lib/ruby/vendor_ruby/sequel/adapters/shared/oracle.rb
/usr/lib/ruby/vendor_ruby/sequel/adapters/shared/postgres.rb
/usr/lib/ruby/vendor_ruby/sequel/adapters/shared/progress.rb
/usr/lib/ruby/vendor_ruby/sequel/adapters/shared/sqlanywhere.rb
/usr/lib/ruby/vendor_ruby/sequel/adapters/shared/sqlite.rb